mirrors
/
Labrador
mirror of https://github.com/EspoTek/Labrador.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Updated Home (markdown)

Chris Esposito 2018-02-06 14:50:04 +11:00
parent f2434922a4
commit 4ce185c612
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Home.md

@ -81,9 +81,9 @@ It’s for an old version of the software. I need to make a new one.
## Oscilloscope
The oscilloscope was designed to be beginner friendly. For this reason, settings such as volts/div and attenuation have been replaced by a whole new interface.
The oscilloscope was designed to be beginner friendly. For this reason, settings such as volts/div and attenuation have been replaced by a simpler interface.
**To zoom in and out**: point the mouse cursor at the area of interest and scroll. If no key is pressed, it will affect the voltage axis. If the Ctrl key is pressed, it will affect the time axis. If you’re on a laptop, you can use the up/down arrows in place of the mouse wheel.
**To zoom in and out**: point the mouse cursor at the area of interest and scroll. If no key is pressed, it will affect the voltage axis. If the Ctrl key is pressed, it will affect the time axis. If you’re on a laptop, you can use the up/down arrows in place of the mouse wheel. Alternatively, press the "M" key and then manually enter your preferred time and voltage range.
**To add cursors**: click and drag. Left-click drops horizontal cursors and right-click drops vertical cursors. Relevant stats are displayed automatically, and **_you can focus on the area inside the cursors_** by selecting Oscilloscope>Range>Snap to Cursors or pressing Z.
@ -103,15 +103,15 @@ This is fairly self-explanatory. Select your wave shape, frequency, amplitude,
## Logic Analyzer
The logic analyzer uses the oscilloscope display to show a waveform, and can serial decode too. At the moment, only UART (8-N-1) is supported. Baudrate for serial decoding can be set by selecting Logic Analyzer > UART CHn in the top menu. SPI and I2C don’t work yet.
The logic analyzer uses the oscilloscope display to show a waveform, and can decode serial streams too. At the moment, only UART (8-N-1) is supported. Baudrate for serial decoding can be set by selecting Logic Analyzer > UART CHn in the top menu.
## Power Supply
Unlock, drag the slider, re-lock. Bob’s your Uncle.
Unlock, drag the slider, re-lock. Big display at the bottom will tell you how many volts are being output. Too easy.
## Multimeter
The multimeter measures the difference between the oscilloscope CH1 and CH2 pins, and uses 12-bit samples at 375ksps. The normal oscilloscope uses 8-bit samples only, **so sometimes the multimeter will function as a better oscilloscope than the oscilloscope will**!
Hardware-wise, the multimeter is just an alternative configuration of the oscilloscope with some additional software added. It measures the difference between the oscilloscope CH1 and CH2 pins, and uses 12-bit samples at 375ksps. The normal oscilloscope uses 8-bit samples only, **so sometimes the multimeter will function as a better oscilloscope than the oscilloscope will**!
**To measure voltage: **set the mode to "V" and connect the load in parallel to Pin 1 of Oscilloscope CH1 and Oscilloscope CH2.
@ -123,7 +123,7 @@ The multimeter measures the difference between the oscilloscope CH1 and CH2 pins
Then type in the reference resistance used into the box.
As an example, if you are measuring the current through a circuit that you suspect draws 50mA from a 3.3V source, you can guesstimate its load resistance to be 66Ω (V=IR). 10% of this is 6.6Ω. To drop 50mV, you’ll need to use at least a 1Ω resistor. So the reference resistor you’ll need for this circuit should be in the range of 1Ω-6.6Ω Ohms. A 2.8Ω or 3.3Ω resistor will be ideal in this case.
As an example, if you are measuring the current through a circuit that you suspect draws 50mA from a 3.3V source, you can guesstimate its load resistance to be 66Ω (as per V=IR). 10% of this is 6.6Ω. To drop 50mV, you’ll need to use at least a 1Ω resistor. So the reference resistor you’ll need for this circuit should be in the range of 1Ω-6.6Ω Ohms. A 2.8Ω or 3.3Ω resistor will be ideal in this case.
**To measure resistance/capacitance: **connect your load to Pin 4 of oscilloscope CH1 and CH2. Connect Pin 1 of Oscilloscope CH1 to Pin 3 of the signal generator. Connect your reference resistor between Pin 1 of Oscilloscope CH2 and GND.